Until the Herald broke the story last Friday, Warren had never mentioned her Native American heritage on the campaign trail even as she detailed much of her personal history to voters in speeches, statements and a video.But yesterday, she insisted, “Being Native American has been part of my story I guess since the day I was born. These are my family stories, I have lived in a family that has talked about Native Americans and talked about tribes since I was a little girl.”Warren’s latest statements came as genealogists at the New England Historic Genealogical Society were unable to back up earlier accounts that her great-great-great-grandmother is Cherokee. Warren’s ancestor, O.C. Sarah Smith, is listed on an electronic transcript of a 1894 marriage application as Cherokee. But as of yesterday, the society was unable to find the actual record or a photocopy, according to spokesman Tom Champoux.A copy of the marriage license itself has been located, Champoux said, but unlike the application, it does not list Smith’s ethnicity.